From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Graphs showing high and low pressure tests for a Delco rear damper with a 12' lever and adjustable leak.
| Identifier | WestWitteringFiles\V\December1930-February1931\ Scan138 | |
| Date | 14th February 1931 guessed | |
| SHT 9 DELCO REAR DAMPER - ADJUSTABLE LEAK. 12" LEVER. Chart 1 (Top Left): DELCO II. HIGH PRESSURE. 4" STROKE. N°1 LEAK. 70 R.P.M 50 R.P.M 25 R.P.M Y-Axis: 462 LB/D" MAX. PRESSURES 1085 LBS/D" 925 " 323 " Chart 2 (Top Right): "DELCO II" LOW PRESSURE. 4" STROKE. N°1 LEAK. 350 R.P.M. 250 R.P.M. 150 R.P.M. Y-Axis: 154 LB/D'. MAX. PRESSURES. 231 LBS/D" 146 " 85 " Chart 3 (Middle Left): DELCO II. HIGH PRESSURE. 4" STROKE. N°3 LEAK. 150 R.P.M. 120 R.P.M. 100 R.P.M. 70 R.P.M Y-Axis: 462 LB/D" MAX. PRESSURES. 1085 LBS/D" 763 " 647 " 531 " Chart 4 (Middle Right): DELCO II. LOW PRESSURE. 4" STROKE. N°3 LEAK. 350 R.P.M. 250 R.P.M. 150 R.P.M. Y-Axis: 154 LB/D'. MAX. PRESSURES. 216 LBS/D" 131 " 77 " Chart 5 (Bottom Left): DELCO II. HIGH PRESSURE. 4" STROKE. N°4 LEAK. 150 R.P.M. 120 R.P.M. 100 R.P.M. 70 R.P.M. Y-Axis: 462 LB/D" MAX. PRESSURES 1065 LBS/D" 832 " 624 " 503 " Chart 6 (Bottom Right): DELCO II. LOW PRESSURE. 4" STROKE. N°4 LEAK. 350 R.P.M. 250 R.P.M. 150 R.P.M. Y-Axis: 154 LB/D'. MAX. PRESSURE 216 LB/D" 139 " 77 " | ||